I. What is radiofrequency ablation? Generally, local anesthesia is used, CT scan is positioned, and the tumor is punctured (percutaneously) according to the measured distance and angle, and after the electrode needle is pierced into the center of the tumor, the electrode is unfolded and radiofrequency ablation is started. Zheng Zhaomin, Department of Minimally Invasive Oncology, Shandong Qianfo Mountain Hospital Tumor cells are less tolerant to heat than normal cells. Local heating to 39-40 ℃ can stop cancer cells from dividing, and up to 41-42 ℃ can cause cancer cells to die or cause DNA damage, and irreversible cell damage occurs above 49 ℃. Cluster electrode radiofrequency electrode emits high frequency radiofrequency wave to excite tissue cells for plasma oscillation, and the heat generated can make the local temperature reach over 90℃, thus killing tumor cells quickly and effectively. The advantages of radiofrequency treatment are 1. the needle of radiofrequency ablation is slim, the diameter of outer sheath is only 2mm, which causes extremely light trauma, minimal pain and few complications. 2. compared with radiotherapy and chemotherapy, the toxic side effects are small, and there is no need to worry about whether the tumor is sensitive to the treatment, the efficacy is high and can be done repeatedly. 3. fast treatment, once can be done. 4. radiotherapy and chemotherapy can be carried out simultaneously to win the time of comprehensive tumor treatment. 5. radiofrequency ablation The ablation technology of needle tract eliminates the hidden danger of needle tract metastasis, which is not possessed by argon helium knife and other treatment means. Will the puncture cause pneumothorax and metastasis of cancer cells? People worry that after puncturing the tumor, the process of removing the needle will bring out the cancer cells and cause the needle tract metastasis, but the needle tract ablation technology of RF ablation is to ablate the needle tract at high temperature during the process of tumor ablation treatment, which eliminates the hidden danger of needle tract metastasis. At the same time, needle tract ablation also has the benefit of stopping bleeding and preventing pneumothorax caused by air leakage from the lung. 2. Is the treatment process painful? Most of the patients have no pain, only sweating, but a few tumors near the chest wall or mediastinum have pain, which can be relieved by intravenous anesthesia or painkillers. 3. Can older patients receive the treatment? Because radiofrequency ablation is minimally invasive, non-surgical, and not as toxic as radiotherapy. It is a “green treatment”, so it is suitable for elderly patients who cannot tolerate surgery and radiotherapy. 4. Can central lung cancer be treated by radiofrequency ablation? As central lung cancer is close to large blood vessels and bronchial tubes, many people, including medical professionals, are concerned that radiofrequency ablation puncture and treatment may damage blood vessels and airways, leading to serious complications. With our precise puncture technique and rich experience in radiofrequency ablation treatment, we selectively treat most patients with central lung cancer. Clinical practice proves that it is safe and effective, significantly relieving symptoms such as coughing and coughing up blood and maximizing control of tumor progression.5. Can large lung tumors be treated by radiofrequency ablation? Yes. Single point ablation is sufficient for lung tumors less than 4cm in diameter. For tumors larger than 4cm, multi-point ablation can also achieve the purpose of ablation and inactivation. 6. Is radiofrequency ablation treatment still meaningful for advanced lung cancer with metastasis? Advanced lung cancer is a systemic disease and should be treated in a comprehensive way, including local and systemic treatment of the tumor. Local treatment is the direct inactivation of visible tumor entity, such as radiofrequency ablation therapy and radiotherapy. Systemic treatment is the treatment of the whole body by drugs, and Chinese herbal medicine can be used for old and frail patients. It is like a modern war, which does not start by sending troops to start a direct position war with the enemy, but first uses weapons of mass destruction, such as missiles to destroy the enemy’s large forces at once, and then sends ground troops to exterminate the stragglers. The treatment of tumor is like a war, we can use radiofrequency ablation as a “weapon of mass destruction” to ablate and inactivate the visible tumor at one time, which is not only fast and effective, but also has little impact on the body, so as to obtain the greatest benefit at the smallest cost, and then, after a short period of recovery and recuperation, we can quickly enter into drug treatment to destroy other potential cancer cells in the body. cancer cells in the body. In addition, radiotherapy can be combined with radiotherapy for tumors that cannot be reached by radiofrequency ablation (such as lymph nodes with enlarged longitudinal walls) if the patient’s body permits. This is a new concept of comprehensive and individualized treatment for advanced tumors.7. How to treat advanced patients who cannot tolerate drug therapy? Radiofrequency ablation can still be adopted. The meaning is to reduce the tumor, alleviate the growth of tumor, reduce the symptoms and pain of tumor, and together with targeted drugs and traditional Chinese medicine, it can still prolong life and reduce pain. 8. Can lung cancer patients with heart disease, lung disease, diabetes, etc. tolerate radiofrequency ablation treatment? Yes, because radiofrequency ablation treatment is extremely minimally invasive and has little damage and impact on the body. Therefore, patients with chronic diseases and cardiopulmonary insufficiency can usually tolerate radiofrequency ablation treatment. 9. Are there any side effects of radiofrequency ablation? Radiofrequency ablation has no side effects if the procedure is successful. Complications such as hematoma at the puncture site may occur in a very small number of patients, but the incidence is extremely low.